Surah Al-Bayyinah — Ayah 4 (98:4)
وَمَا تَفَرَّقَ ٱلَّذِينَ أُوتُواْ ٱلۡكِتَٰبَ إِلَّا مِنۢ بَعۡدِ مَا جَآءَتۡهُمُ ٱلۡبَيِّنَةُ ٤
English translation (Saheeh International)
Nor did those who were given the Scripture become divided1 until after there had come to them clear evidence.
- - Into sects and denominations.
Brief commentary
The Jews who were given the Torah and the Christians who were given the Gospel, did not disagree except after Allah sent His Prophet to them. There were some who became Muslims, and others who persisted in their disbelief despite knowing of the truth of their Prophet.